diff --git a/.github/workflows/golangci-lint.yml b/.github/workflows/golangci-lint.yml
new file mode 100644
index 0000000..c42e65d
--- /dev/null
+++ b/.github/workflows/golangci-lint.yml
@@ -0,0 +1,29 @@
+name: lint
+on:
+  push:
+    tags:
+      - v*
+    branches:
+      - master
+      - main
+  pull_request:
+jobs:
+  golangci:
+    name: golangci-lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v2.3.0
+        with:
+          # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
+          version: v1.32.2
+
+          # Optional: golangci-lint command line arguments.
+          # args: ./the-only-dir-to-analyze/...
+
+          # Required: the token is used for fetching a list of releases of golangci-lint.
+          # The secret `GITHUB_TOKEN` is automatically created by GitHub,
+          # no need to create it manually.
+          # https://help.github.com/en/actions/configuring-and-managing-workflows/authenticating-with-the-github_token#about-the-github_token-secret
+          github-token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..d151fc9
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,40 @@
+name: test
+on:
+  push:
+    tags:
+      - v*
+    branches:
+      - master
+      - main
+  pull_request:
+env:
+  GO111MODULE: "on"
+jobs:
+  test:
+    strategy:
+      matrix:
+        go-version: [ 1.13.x, 1.14.x, 1.15.x ]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Restore vendor
+        uses: actions/cache@v1
+        with:
+          path: vendor
+          key: ${{ runner.os }}-go-vendor-${{ hashFiles('**/go.mod') }}
+      - name: Populate dependencies
+        if: matrix.go-version == '1.15.x' # Use latest Go to populate vendor.
+        run: '(test -d vendor && echo vendor found) || go mod vendor'
+      - name: Test
+        run: make test-unit
+      - name: Upload code coverage
+        if: matrix.go-version == '1.15.x'
+        uses: codecov/codecov-action@v1
+        with:
+          file: ./unit.coverprofile
+          flags: unittests
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..e0269f7
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,38 @@
+GOLANGCI_LINT_VERSION := "v1.32.2"
+
+# The head of Makefile determines location of dev-go to include standard targets.
+GO ?= go
+export GO111MODULE = on
+
+ifneq "$(GOFLAGS)" ""
+  $(info GOFLAGS: ${GOFLAGS})
+endif
+
+ifneq "$(wildcard ./vendor )" ""
+  $(info Using vendor)
+  modVendor =  -mod=vendor
+  ifeq (,$(findstring -mod,$(GOFLAGS)))
+      export GOFLAGS := ${GOFLAGS} ${modVendor}
+  endif
+  ifneq "$(wildcard ./vendor/github.com/bool64/dev)" ""
+  	DEVGO_PATH := ./vendor/github.com/bool64/dev
+  endif
+endif
+
+ifeq ($(DEVGO_PATH),)
+	DEVGO_PATH := $(shell GO111MODULE=on $(GO) list ${modVendor} -f '{{.Dir}}' -m github.com/bool64/dev)
+	ifeq ($(DEVGO_PATH),)
+    	$(info Module github.com/bool64/dev not found, downloading.)
+    	DEVGO_PATH := $(shell export GO111MODULE=on && $(GO) mod tidy && $(GO) list -f '{{.Dir}}' -m github.com/bool64/dev)
+	endif
+endif
+
+-include $(DEVGO_PATH)/makefiles/main.mk
+-include $(DEVGO_PATH)/makefiles/test-unit.mk
+-include $(DEVGO_PATH)/makefiles/lint.mk
+-include $(DEVGO_PATH)/makefiles/github-actions.mk
+
+## Run tests
+test: test-unit
+
+
diff --git a/dev_test.go b/dev_test.go
new file mode 100644
index 0000000..3433e05
--- /dev/null
+++ b/dev_test.go
@@ -0,0 +1,3 @@
+package shared_test
+
+import _ "github.com/bool64/dev"
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..3860071
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,8 @@
+module github.com/bool64/shared
+
+go 1.11
+
+require (
+	github.com/bool64/dev v0.1.10
+	github.com/stretchr/testify v1.6.1
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..3ffc010
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,13 @@
+github.com/bool64/dev v0.1.10 h1:4L6eLD+qo1QgWDy+Y7OhJxi/gLwOAuV1rd07noMc3dU=
+github.com/bool64/dev v0.1.10/go.mod h1:pn52JC52uSgpazChx9CeXyG+S3sW2V36HHoLNBbscdg=
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
+github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/vars.go b/vars.go
new file mode 100644
index 0000000..12da751
--- /dev/null
+++ b/vars.go
@@ -0,0 +1,70 @@
+// Package shared provides space to share variables.
+package shared
+
+import (
+	"strings"
+	"sync"
+)
+
+// Vars keeps values of named variables.
+type Vars struct {
+	// VarPrefix determines which cell values should be collected as vars and replaced with values in usages.
+	// Default is '$', e.g. $id1 would be treated as variable.
+	VarPrefix string
+
+	mu   sync.Mutex
+	vars map[string]interface{}
+}
+
+// Reset removes all variables.
+func (v *Vars) Reset() {
+	v.mu.Lock()
+	defer v.mu.Unlock()
+
+	v.vars = make(map[string]interface{})
+}
+
+// IsVar checks if string looks like a variable name.
+func (v *Vars) IsVar(s string) bool {
+	varPrefix := v.VarPrefix
+	if varPrefix == "" {
+		varPrefix = "$"
+	}
+
+	return strings.HasPrefix(s, varPrefix)
+}
+
+// Get returns variable value if is exists.
+func (v *Vars) Get(s string) (interface{}, bool) {
+	v.mu.Lock()
+	defer v.mu.Unlock()
+
+	val, found := v.vars[s]
+
+	return val, found
+}
+
+// Set sets variable by name.
+func (v *Vars) Set(key string, val interface{}) {
+	v.mu.Lock()
+	defer v.mu.Unlock()
+
+	if v.vars == nil {
+		v.vars = make(map[string]interface{})
+	}
+
+	v.vars[key] = val
+}
+
+// GetAll returns all variables with values.
+func (v *Vars) GetAll() map[string]interface{} {
+	v.mu.Lock()
+	defer v.mu.Unlock()
+
+	res := make(map[string]interface{}, len(v.vars))
+	for k, val := range v.vars {
+		res[k] = val
+	}
+
+	return res
+}
diff --git a/vars_test.go b/vars_test.go
new file mode 100644
index 0000000..41135e6
--- /dev/null
+++ b/vars_test.go
@@ -0,0 +1,24 @@
+package shared_test
+
+import (
+	"testing"
+
+	"github.com/bool64/shared"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestVars_GetAll(t *testing.T) {
+	v := shared.Vars{}
+
+	v.Set("k", "v")
+	val, found := v.Get("k")
+	assert.True(t, found)
+	assert.Equal(t, "v", val)
+
+	assert.Equal(t, map[string]interface{}{"k": "v"}, v.GetAll())
+	assert.True(t, v.IsVar("$var"))
+	assert.False(t, v.IsVar("var"))
+
+	v.Reset()
+	assert.Equal(t, map[string]interface{}{}, v.GetAll())
+}